A 1200 kg Toyota Echo is accelerating down a hill. The hill is 150 m long and the total distance in elevation of the hill is 15 m. The car accelerates from a speed of 2.0 m/s at the top to an unknown velocity at the bottom in 11 s. The power of the car is 9.6 kW, while the average retarding force of friction is 600 N. Find the speed of the car at the bottom of the hill.
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